Dual quad core only recognizing single xeon-- help!

Hello,

I've seen this posted on a few forums so here goes. It appears that various folks have struggled with this process through Vista and Windows XP 64- This is my first post and I've heard nothing but good things about this group. Please help me!

INTENT: I am upgrading a Dell Precision 490 Workstation with Dual Quad Core Xeon Processors, 4GB RAM, and 160GB SAS ATA HD from Windows XP-64 to Windows 7 SP1 Professional 64-Bit. Fresh installation.

CHALLENGE: Windows 7 64-Bit SP1 Professional will NOT see the 2nd XEON processor.

THINGS TRIED:

1. I used MSCONFIG in the start Menu. Went to the Boot Tab. Pressed the Advanced Options Button and on multiple boots did the following: a. Clicked on the multiple processors button and rebooted. b. Clicked it again and rebooted. I was only able to select 4 processors from the single Xeon that the system is seeing.
2. I upgaded the system BIOS from Dell's A06 to A08.
3. I entered F2 to enter BIOS setup and looked for any Multiprocessor menu's, support, HAL selection, etc... Nada. There is one menu for multi-threading which this generation of Xeon does NOT support (Xeon E5320).
4. Went to my local computer store, bought some new heat-paste and reseated both processors. Rebooted and tried #1 and #3 again. No sucesss.
5. I double checked all the other things you might think about. This is a stock Dell MOBO and I didn't see any CUDA-styled swith (like on the Apple) to reset the MOBO. There aren't any jumpers on this system to turn on/off a dual processor set up. I double checked all the connections to hard-drives, video cards, sound cards, internal USB, and the like with out any success.

THINGS TO NOTE:

1. The BIOS doesn't see anything but processor (0) with a single quad core.

THINGS I'M THINKING ABOUT:

1. I'm new to Windows 7 but wasn't there an ACPI HAL Stuff in Windows XP 64 that you could click or not click for multi-processor support vs. Single Processor Support. Where is this function if available in Windows 7 Professional?

2. I'm going to reseat the CPU's again but this time reverse them (put processor 0 in processor 1 slot and visa versa) so if one of them is bad, I'll see it in the BIOS doing this reversal. I just bought this unit refurbished so I believe I'll be in a good spot since I got a warrenty with it for 1 year and I can easily get a new part.

QUESTIONS FOR THE GROUP:

1. What else is there to try regarding multi-processor support from Dell and the Precision 490 when migrating from 64-bit XP to 64-bit Windows 7 Professional?

2. I do have a Windows Virtual Machine running XP 32-bit emmulator running on the system to use some software that isn't 64-bit compatible and probably never will. Could this cause a problem?

3. Are there any known issues regarding this mess?

There are a few knowns for others in this situation that need to be said about Windows 7 and that is:

To elaborate, the Home Basic and Starter editions support 1 physical processor, with an unlimited amount of cores. All other editions support 2 physical processors.

Remember, it's processor, then core. A processor consists of cores.

So...

Windows Starter and Home Premium dont' support Muti-Processing
Windows Professional, Enterprise, and ultimate Do.

By the Way, I'm using Professional 64-bit. I downloaded CPU-Z as directed by several other folks wrestling with similar issues on the web. I am copying and pasting the resuts here for your assistance.

CPU-Z TXT Report
-------------------------------------------------------------------------
Binaries
-------------------------------------------------------------------------
CPU-Z version 1.60
Processors
-------------------------------------------------------------------------
Number of processors 1
Number of threads 4

APICs
-------------------------------------------------------------------------
Processor 0
-- Core 0
-- Thread 0 0
-- Core 1
-- Thread 0 1
-- Core 2
-- Thread 0 2
-- Core 3
-- Thread 0 3

Processors Information
-------------------------------------------------------------------------
Processor 1 ID = 0
Number of cores 4 (max 4)
Number of threads 4 (max 4)
Name Intel Xeon E5320
Codename Clovertown
Specification Intel(R) Xeon(R) CPU E5320 @ 1.86GHz
Package (platform ID) Socket 771 LGA (0x6)
CPUID 6.F.7
Extended CPUID 6.F
Core Stepping B3
Technology 65 nm
Core Speed 1592.1 MHz
Multiplier x FSB 6.0 x 265.3 MHz
Rated Bus speed 1061.4 MHz
Stock frequency 1866 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T, VT-x
L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L2 cache 2 x 4096 KBytes, 16-way set associative, 64-byte line size
FID/VID Control yes
FID range 6.0x - 7.0x
Max VID 1.250 V


If you want the thread dumps and all that other fancy stuff send me an email and I'll forward it to you.

I have the exact same problem with my system after an upgrade to Win7 Pro x64 from Home Premium x64 specifically to add second physical processor...

Mobo will not "see" second processor at all.

Replaced mobo and running latest Dell BIOS (A08) to no avail...

Used MSCONFIG and EasyBCD 2.2 to "force" Windows to look for more cores... nada!

Suggestions??

logicearth said:

You guys are looking in the wrong place for a solution. You need to focus on the motherboard and the BIOS. If the motherboard is only seeing one processor anything you do in Windows is just pissing in the wind. You need to solve the issue of the motherboard not seeing the second processor.

Thanks logicearth.

Several other Windows Forums note this condition that occurs when upgrading to Windows Pro where your BIOS, which supports multi-core and/or multiple processors, does not recognize the new processor you've installed.

I've stripped mine to bare bones, put everything back together one step at a time, upgraded to latest BIOS, installed second known working processor in a socket I know works (tested with working processor and SiSoft)...
Still... One dual core processor in BIOS, Task Manager, and Device Manager, with both (two individual) dual-core Xeons showing up in SiSoft reports as there.

I upgraded to Windows 7 Pro x64 online so I do not own the disc or I would do a clean install...

If you've got some suggestions as to why a motherboard that Dell swears supports two processors with the current BIOS, please help point me in the right direction!

Cheers.

I have a 490 that would not detect my second CPU until I replaced the power supply. Make sure you have an authentic Dell PSU. I replaced mine with Dell part# U9692 and it fixed everything! Hope this helps. Steve